Elenco Projects 306-511 - Manual (Page 26)

Project #360
OBJECTIVE: To measure the current through a transformer.
Set the meter (M2) to the LOW (or 10mA) setting. By placing the
meter, diode (D3) and current limiting resistor (R4) on the transformer
(T1), you can measure the current. Turn on the slide slide switch (S1)
and the motor (M1) starts spinning. The current on the right side of the
transformer creates a current on the left side using magnetism.
Current Meter
-25-
Project #359
OBJECTIVE: To convert an AC current to DC using an LED.
Set the meter (M2) to the LOW (or 10mA) scale. Pressing and
releasing the press switch (S2) continuously generates an AC
(changing) current. The LED (D1) is used to convert the AC
(changing) current to DC (unchanging) current because it only allows
the current to flow in one direction. The LED should light as the meter
deflects to the right only. Without the LED, the meter would deflect in
both directions.
AC to DC Current
!
WARNING: Moving parts. Do not touch the fan or
motor during operation. Do not lean over the motor.